Genesis 5:13
Kenan lived 840 years after he became the father of Mahalalel, and he had other sons and daughters.
Treasury of Scripture Knowledge
Summary
And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:
And begat
Bible References
And begat
Genesis 5:4
The length of time Adam lived after he became the father of Seth was 800 years; during this time he had other sons and daughters.